I understand this is a preliminary number for a beta for just showing how the guild achieves will work and all. However, the current 25,000 glyphs requirement for the achieve "Pen is Mightier" seems a little too obscene. Currently on Wowhead there are 345 glyphs that are craftable or were craftable at a time. So roughly divided amongst 10 classes as a guesstimate leaves 35 glyphs per person to fully glyph them in all slots as glyphs are no longer reconsumable (you get one and that's all you'll ever need). 25,000/35=714, which means your guild will be responsible for glyphing to the max 714 characters. I'm sorry but seems like waaaay too much. All the other profession guild achievements seem reasonable as long term effects of being a guild such as: making consumables for raids, crafting gear at each level when raids are released (think crafting items with frozen orbs, then later with runed orbs, then crusader...), or fishing for a long time. But making glyphs has a definitive end point. You learn your 35 glyphs and you're done after which you are left to either attempt to AH the extra, store them somewhere, or just vendor them. This achieve makes me think that one guild trying to get this achieve will throw money at it and then tank the glyph market with surplus glyphs because they aren't making them to sell for a profit so they can always undercut down to close to vendor cost.
My only hope is that one of two things happen: the number is reduced OR Vanishing Powder and it's other variant is added to the achieve. Reducing the number obviously will make it more attemptable but moreover adding the craftable powder to the achieve means there is a consumable component to the equation and a guild may be able to achieve the goal over an extended period of time from normal operations as a guild.